System for removing air and gases from water



H. N. EHRHAHI SYSTEM FOR REMOVING MR AND GASES mom WATER.

APPUCA'HONF\LEUlUNE5,192U.

1,40 1 1 O 1 Patented Dec. 20, 1921.

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UNITED STATES PATENT OFFECE.

RAYMOND N. EHRHART; OF PITTSIBURGH, PENNSYLVANIA, ASSIGNOR TO ELLIOTTCOMPANY, OF PITTSBURGH. PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

SYSTEM FOR REMOVING AIR AND GASES I'ROM WATER.

I Application filed June 5,

To all whom it may concern:

Be it known that 1, RAYMOND NHEHR- ma'r a citizen of the United States,residing at Pittsburgh, Allegheny county, Pennsyl- Vania, have inventeda new and useful Improvement in Systems for Removing Air and Gases fromWater, of which the followin is a full, clear, and exact description,refinance being had to the accompanying drawings, in which 1 Figure 1 isa diagrammatic section illustrating one form of my invention, and

v Fig. 2 is a diagrammatic elevation, partly broken away, illustratinganother form of m invention.

y invention has relation to apparatus for treatment of water andotherliquids,

and relates generally'to means for removing air and gases from the waterin the manner described and -claimed.in. a patent to William S. ElliottNo. 1,321,999, dated Novem ber 18, 1919. The method described andclaimed in said patent comprises a heater 'for heating the water to hetreated, an

trated and, described is of the surface type.

In that system, the total withdrawal of air is made from the surfacecondenser, such withdrawal taking place after the feed-water hastraversed through the system to, the

- evaporator.

The object of-the present invention is to provlde means of elficientcharacter whereby a portion ofthe air may be withdrawn from thefeed-water before it enters the heater,

thereby reducing the amount of air to be removed by the evaporator.

A. further object of tlie invention is to provide method and means ofthis character which .will opezate to simultaneously withdraw air fromthe Water entering the condenser and also from the steam leaving the.evaporator.

have discovered that by using an open T'- Specification of LettersPatent.

Patented Dec. 20, 1921.

1920. Serial No. assess.

type condenser of the jet or barometric form, these objects may bereadily and effectively carried out.

Referring first to Fi 1 of the accompan ing drawings in which I haveshown a. pre erred embodiment of my invention, the numeral 2 designatesa heater of the general form described 'in said Patent No. 1,321,999, 3the connection for supplying exhaust steam to the heater, 4 anevaporator and 5 a pump or other suitable means for Withdrawing thetreated watei' from the evaporator.

6. designates a water supply pipe which delivers water into thecondensing chamber of a condenser 7 of the barometric type, thiscondenser having its tail pipe discharging into the well or container 9which,

in turn, discharges into the heater 2. 10

designates a pipe connection leading from the evaporating chamber of theevaporator 1 into the condenser 7; and 11 designates exhaustingmeansa-such as a steam egector, connected to the condensino' chamber ofthe condenser and 'which, as will be seen, is arranged. to act tosimultaneously remove air from the water coming into the condenser byway of the pipe 6 and also fronrthe steam and vapors coming into thecondenser through the pipe 10 from the evaporator.

In using this type of condenser. the distance a should he great enoughto counterbalance the difference between atmospheric pressure and thepressure in the condenser. Instead of using a barometric condenser, asshown in Fig. 1, 1 may use a condenser of the low level type, such asshown at 12 in Fig. 2. In this case, it is nece ry to provide means suchas a pump 13 elethe heater. The other parts shown in this figurecorresponding to similar parts in Fig. l are given the same referencenumerals with the letter a aflixed.

The advantages of my invention will be apparent since it will be readilyseen that by removing as much air as possible from the water enteringthe system. the duty thrown on the evaporator is greatly reduced,inasnmch as the evaporator docs not have the same air content to dealwith.

A further advantage of the in enti n con' sists in the fact that by thesame operation which removes air and other dissolaahlc gases from theliquid, the temperature of the liquid is raised. This is effected withthe loss of very little energy, since the exhaust steam may be used asthe heating medium and a large portion of the heat losses which wouldotherwise be due to the drop in'temperalure in the evaporator isrecovered in the condenser which acts as a heat exchanger.

It will be understood that the arrangements which I have shown areillustrative only and that the invention may be carried out in variousother ways.

I claim:

1. In the treatment of liquids for heating the same and for the removalof air and gases therefrom, the method which consists in introducing theliquid to be treated into an evaporator in which a pressure ismaintained lower than the pressure corresponding to the temperature ofthe liquid before it enters the evaporator, passing the vapors from theevaporator through a condenser, and simultaneously withdrawing air'fromthe liquid entering the condenser and passing therethrough to a heater,and from the steam coming from the evaporator and heating the liquid insaid heater, substantially as described.

' 2. Apparatus V for treating liquids for heating the same and for theremoval of air and gases therefrom, comprising a heater, an evaporatorconnected with the discharge of the heater,acondenser connected with thegas and vapor offtake of the evaporator, a water supply connection forthe condenser, and means which act simultaneously upon the water asitenters the condenser and upon the vapors leaving the evaporator toextract air and other non-condensible gases therefrom, substantially asdescribed.

3. Apparatus for treating liquids for heating the same and for theremoval of air and gases therefrom, comprising a heater, an evaporator,a condenser connected with the evaporator to receive the gas and vaporstherefrom and. through which the liquid supply for the heater andevaporator passes, and means connected to the condenser for withdrawingtherefrom a portion of the air RAYMOND N. EHRHART.

